Machine for straightening



(No Model.) 2 Sheets-Sheet 2.

M. BLAKEY.

MACHINE FOR STRAIGHTENING, ROUNDING, AND FINIS TU'B I c. No. 250,627.Patented .6,1 l.

UNITED STATES PATENT OFFICE.

MILDRED BLAKEY, OF ETNA, ASSIGNOR TO SPANG, OHALFANT & 00., OF ALLEGHENYCOUNTY, PENNSYLVANIA.

MACHINE FOR STRAIGHTENING, ROUNDlNG, AND FlNlSHING TUBES, &c.

SPECIFICATION forming part of Letters Patent No. 250,627, dated December6, 1881.

Application filed July 18, 1881.

To all whom it may concern:.

Be it known that 1, MILDRED BLAKEY, of Etna borough, county ofAllegheny, State of Pennsylvania, have invented or discovered a new anduseful Improvement in Machines for Straightening,Rounding, andFinishingPipes, Tubes, and Similar Articles; and I do hereby declare thefollowing to be a full, clear, concise, and exact description thereof,reference being had to the accompanying drawings, making a part of thisspecification, in which-like letters indicating like parts Figure 1,Sheet 1, is a top plan view of my improved machine. Fig. 2, Sheet 2, isa sectional view taken in the plane of the line w :r, Fig. 1. Fig. 3shows an end elevation of the machine. standards or housings by whichthe rolls are supported and adjusted; and Fig. 5 is a sectional view ofsuch standard, taken lengthwise ofthe machine in the plane ot'the line gy,Fig.4.

My invention relates to a machine for straightening, rounding, andfinishing pipes, tubes, and similar articles; and it consists in certaincombinations of cylindrical rolls arranged parallel and geared to rotatein the same direction, their surfaces moving at different velocities,with avertically-movable supporting device for bold ing the pipe or tubein position to be operated on by the rolls, and for permitting dischargeof the pipe or tube when desired, and means for adjusting the rolls andgiving them the requisite motions, as hereinafter described and claimed.

In the drawings, A and B represent two parallel cylindrical rolls havinga length equal to or in excess of the pipe P to be operated on. Theserolls are supported at either end by housin gs G, each of which consistsof a standard, 0, and two divergent arms, 0 0. These arms havepivot-connection with the standards by means of eyes 6 and pivot-boltsE, the latter passing through the eyes of the arms and through holes 0in the tops of the standards. Toward their upper ends the two arms 0 0of each housing are connected together by stretcher-rods D, which arepassed through suitable holes made in the raised lugs (1. By turning thenuts cl on the threaded ends of rods D the arms 0' c of each housing maybe moved on their pivots Fig. 4 shows in elevation one of the.

(No model.)

E toward or from each other. The rolls A and B are journaled in suitablebearings, 0 made in the outer ends of arms 0, and these arms areadjusted, as above described, so as to separate the two rolls, thedesired distance dependingv 5'5 upon the size of pipe or other articleto be operated on. These arms thus furnish a simple and convenient meansof adjustment of the rolls. The two rolls are geared to rotate in thesame direction, as follows:

A power-shaft, F, is mounted by suitable bearin gs, f, on the standards0,-extendin g under the rolls from standard to standard. On the ends ofthis shaft, outside of the standards, are secured gear-Wheels F. Also,similar gearwheels G, adapted to gear with the wheels F, are mountedidle on the pivot-bolts E. On the extended end of each roll-shaft isalso a gearwheel, H, adapted to gear with its adjacent wheel G. Twotrains of gears, F G H, are thus provided, which take motion from acommon shaft,'F, and rotate the two rolls in the same direction, oneroll being driven at one end of the machine and the other roll at theother end, as shown. 7

Driving-power may be applied to shaft F in the usual or any convenientway.

The position of the pipe I? in the machine is between and parallel withthe rolls, with its' axial center in aplane through the axes of therolls. In order to support the pipe or tube in such position, I make useof a rest-bar, R, having a length equal, or nearly equal, to the rolls.The upper or working face of this bar may be flat, as shown; or it maybe concave; or, if pre- 8 5 ferred, a third roll may he used instead ofthe bar. This bar or its equivalent roller is supported in position bytwo or more levers, S,

\vhich'extend outward from the bar, and have a fulcrum on or pivotedconnection with posts 0 or standards S. For convenience in operatingjtfhese levers, they are connected at their out'e'i ends by a rod, .9.By depressing the outer ends of these levers-the bar is raised toposition directly under the pipe 1?, as in Fig. 2, and it may be lockedin such position by means of a hook, T, (see Fig. 1,) or by otherconvenientfastening device. On releasing this hook the bar B. may bedropped, as in Fig. 3, thereby permitting discharge of the pipe on asabove described.

the under side of the rolls. The bar may be raised and lowered in thisway either by hand or by hydraulic, steam, or other power, as the sizeand weight of the apparatus may require.

It has been stated that the rolls A and B are rotated in the samedirection by the trains of gearing described.

It is an important feature of this machine that the surfaces of theserolls move at different velocities, that roll-surface moving fastestwhich rotates toward the upper face of bar B. This may be secured bygearing one roll to rotate faster than the other; but I prefer to gearboth rolls alike, as described above, and to make that roll, as roll A,which is to have faster surface velocity of greater diameter than theother, B. By this means the desired result is fully obtained, and alsothe arms 0 may be adjusted alike at both ends of the machine morereadily than though the two trains of gearing were dissimilar.

The object of giving the roll A greater surface velocity than the rollBis to increase thereby the tendency of rollAto hold the pipe down uponthe barB as against the tendency of roll B to raise it therefrom. Thisis especially important, as the working plane or lines of bite of therolls are in the plane of their axes, instead of being a little belowsuch axial plane, as heretofore, where the pipe or rod is fed endwisethrough the rolls.

In the present machine the article to be operated on is laid sidewisebetween the rolls, on their upper side, as in Fig. 1, when it is carrieddown and held upon the barR by the roll A until it is discharged bydropping the bar,

There is no endwise motion of the pipe into or through the rolls; but,

owing to the rotation of the rolls in the same direction, they rotatethe pipe between them, and rub and scour it on the barR and betweentheir surfaces, owing to the difference in surface velocities described.In this way the article P is straightened throughout its whole lengthsimultaneously, and is given a round, smooth, and well-finished surface.a

I am aware that both cylindrical and conical rolls have been employedfor straightening and finishing rods, tubes, &c., such rolls beingarranged both parallel and inclined or crossed; but such machines, sofar as I am aware, are designed to operate upon the articleprogressively by feeding it endwise through the rolls, such feed motionbeing given either by the rolls themselves or by some independentmechanism. Considerable difficulty has been experienced in the use ofsuch machines for straightening pipes, owing to the torsion or rendin gtendency of the rolls incident to the feeding or endwise movement of thepipe in connection with its rotary movement. This difficulty is obviatedin my machine by makin g the rolls of suificient length to operate uponthe entire length of pipe simultaneously, and feeding the pipe sidewiseto and discharging it from such rolls, as above described. I thus avoidendwise feed and perform the desired work rapidly with little strainupon the article, and with better results than when a part of the pipeonly is acted on at one time by the rolls.

I I claim herein as my invention- 1. In a machine for straightening,rounding, and finishing pipes, tubes, 850., two cylindrical rolls, A andB, arranged parallel and geared to rotate in the same direction, withtheir surfaces moving at different velocities, such rolls being adaptedto receive the article sidewise and operate simultaneously upon itsentire length, as described, in combination with vertically-movablesupport R, adapted, when raised,to hold the pipe upward between therolls, and when lowered to permit discharge of the pipe downward, andmechanism for giving to the support such upward and downward movements,substantially as set forth.

2. The combination of two cylindrical rolls, A B, of differentdiameters, arranged parallel, and adapted to receive a pipe or tubesidewise from their upper side, gear mechanism for giving such rollsrotary motion in the same direction, vertically-movable bar B, andmechanism for moving such bar toward and from the rolls and looking itin position for supporting the pipe or article between the rolls,substantially as set forth.

3. The combination of rolls A B, bar R, pivoted levers S for supportingand moving the bar, and a locking device for holding the levers and barin position to support the article to be operated between the rolls,substantially as set forth.

4. The combination of housings 0, having standards 0 and pivotedjournal-arms 0, adjusting or stretcher rods D, rolls A B, gear mechanismfor rotating the rolls in the same direction, and vertically-movableunder support, It, substantially as set forth.

ICC

In testimony whereof I have hereunto set I my hand.

MILDRED BLAKEY.

Witnesses:

O. L. PARKER, WM. A. HOLMA'N.

